Thanks guys, and I hope you were being funny Mac . I spent the good part of two hours cussing over my laziness, not that I'm gonna change. At least I cleaned the carboy first and didn't leave the crud in it for a week. John

CLR is a guaranteed fix. I had a bad case of these crystals in a keg after a forgotten soaking with Oxyclean. The inside of the keg was like 40 grit sandpaper. Straight vinegar and scrubbing didn't do a thing. A fairly strong mix of CLR however removed all traces instantly.